anti-feature

Functionality that the seller of a product (typically technology) will charge users to not include.

The printer's anti-features made it hardly worth using: the small $40 ink cartridges get blacklisted after first use to prevent refilling.

"DRM and Treacherous Computing systems are, in many ways, extreme examples of antifeatures. Users don't want either and they are hugely expensive and extremely difficult for developers to implement."[1]

"We evaluate software and hardware not simply on which has more features but also on which has fewer antifeatures."[2]